org.eclipse.swt.widgets.Tree.getItemHeight()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中org.eclipse.swt.widgets.Tree.getItemHeight()方法的一些代码示例，展示了Tree.getItemHeight()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Tree.getItemHeight()方法的具体详情如下：
包路径：org.eclipse.swt.widgets.Tree
类名称：Tree
方法名：getItemHeight

Tree.getItemHeight介绍

[英]Returns the height of the area which would be used to display one of the items in the tree.
[中]返回用于显示树中一个项的区域的高度。

代码示例

代码示例来源：origin: org.eclipse.platform/org.eclipse.ui.workbench

private void ensureImageSize() {
  if (imageSize == -1) {
    imageSize = tree.getViewer().getTree().getItemHeight();
    usableImageSize = Math.max(1, imageSize - 4);
  }
}

代码示例来源：origin: kiegroup/droolsjbpm-tools

public IUTreeViewer(Composite parent, int style) {
  super(parent, style);
  final Tree tree = getTree();
  GridData gd = new GridData(GridData.FILL_BOTH);
  gd.minimumHeight = 3 * tree.getItemHeight();
  tree.setLayoutData(gd);
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

int getInnerHeight() {
 int innerHeight = itemCount * parent.getItemHeight();
 for( int i = 0; i < itemCount; i++ ) {
  TreeItem item = items[ i ];
  if( item != null && item.getExpanded() ) {
   innerHeight += item.getInnerHeight();
  }
 }
 return innerHeight;
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

final int getVisibleRowCount( boolean includePartlyVisible ) {
 int clientHeight = getClientArea().height - getHeaderHeight();
 int result = 0;
 if( clientHeight >= 0 ) {
  int itemHeight = getItemHeight();
  result = clientHeight / itemHeight;
  if( includePartlyVisible && clientHeight % itemHeight != 0 ) {
   result++;
  }
 }
 return result;
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt.q07

private static void writeItemHeight( final Tree tree ) throws IOException {
 JSWriter writer = JSWriter.getWriterFor( tree );
 Integer newValue = new Integer( tree.getItemHeight( ) );
 if( WidgetLCAUtil.hasChanged( tree, PROP_ITEM_HEIGHT, newValue ) ) {
  writer.set( PROP_ITEM_HEIGHT, "itemHeight", newValue, new Integer( 16 ) );
 }
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

int getItemTop() {
 int headerHeight = parent.getHeaderHeight();
 int itemHeight = parent.getItemHeight();
 return headerHeight + ( getFlatIndex() - parent.getTopItemIndex() ) * itemHeight;
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

boolean needsVScrollBar() {
 int availableHeight = getClientArea().height;
 int height = getHeaderHeight();
 height += itemCount * getItemHeight();
 for( int i = 0; i < itemCount; i++ ) {
  TreeItem item = items[ i ];
  if( item != null && item.getExpanded() ) {
   height += item.getInnerHeight();
  }
 }
 return height > availableHeight;
}

代码示例来源：origin: org.eclipse/org.eclipse.jdt.debug.ui

/**
 * Creates a runtime classpath viewer with the given parent.
 *
 * @param parent the parent control
 */
public RuntimeClasspathViewer(Composite parent) {
  super(parent);
  
  GridData data = new GridData(GridData.FILL_BOTH);
  data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
  data.heightHint = getTree().getItemHeight();
  getTree().setLayoutData(data);
  
  getTree().addKeyListener(new KeyAdapter() {
    public void keyPressed(KeyEvent event) {
      if (updateSelection(RuntimeClasspathAction.REMOVE, (IStructuredSelection)getSelection()) && event.character == SWT.DEL && event.stateMask == 0) {
        List selection= getSelectionFromWidget();
        getClasspathContentProvider().removeAll(selection);
        notifyChanged();
      }
    }
  });
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

public void handleSetTopItemIndex( Tree tree, JsonObject properties ) {
 JsonValue value = properties.get( PROP_TOP_ITEM_INDEX );
 if( value != null ) {
  int topItemIndex = value.asInt();
  getTreeAdapter( tree ).setTopItemIndex( topItemIndex );
  int scrollTop = topItemIndex * tree.getItemHeight();
  setScrollBarSelection( tree.getVerticalBar(), scrollTop );
 }
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt.q07

private static void readTopItemIndex( final Tree tree ) {
 String topItemIndex = WidgetLCAUtil.readPropertyValue( tree, "topItemIndex" );
 if( topItemIndex != null ) {
  final ITreeAdapter treeAdapter = getTreeAdapter( tree );
  int newIndex = parsePosition( topItemIndex );
  int topOffset = newIndex * tree.getItemHeight();
  treeAdapter.setTopItemIndex( newIndex );
  processScrollBarSelection( tree.getVerticalBar(), topOffset );
 }
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt.q07

public void preserveValues( Widget widget ) {
 Tree tree = ( Tree )widget;
 ControlLCAUtil.preserveValues( ( Control )widget );
 IWidgetAdapter adapter = WidgetUtil.getAdapter( tree );
 adapter.preserve( PROP_SELECTION_LISTENERS,
          Boolean.valueOf( SelectionEvent.hasListener( tree ) ) );
 adapter.preserve( PROP_HEADER_HEIGHT, new Integer( tree.getHeaderHeight() ) );
 adapter.preserve( PROP_HEADER_VISIBLE, Boolean.valueOf( tree.getHeaderVisible() ) );
 adapter.preserve( PROP_LINES_VISIBLE, Boolean.valueOf( tree.getLinesVisible() ) );
 preserveItemMetrics( tree );
 adapter.preserve( PROP_COLUMN_COUNT, new Integer( tree.getColumnCount() ) );
 adapter.preserve( PROP_TREE_COLUMN, getTreeColumn( tree ) );
 adapter.preserve( PROP_ITEM_HEIGHT, new Integer( tree.getItemHeight() ) );
 adapter.preserve( PROP_ITEM_COUNT, new Integer( tree.getItemCount() ) );
 adapter.preserve( PROP_SCROLL_LEFT, getScrollLeft( tree ) );
 adapter.preserve( PROP_TOP_ITEM_INDEX, new Integer( getTopItemIndex( tree ) ) );
 adapter.preserve( PROP_HAS_H_SCROLL_BAR, hasHScrollBar( tree ) );
 adapter.preserve( PROP_HAS_V_SCROLL_BAR, hasVScrollBar( tree ) );
 adapter.preserve( PROP_SCROLLBARS_SELECTION_LISTENER, hasScrollBarsSelectionListener( tree ) );
 adapter.preserve( PROP_ENABLE_CELL_TOOLTIP,
          new Boolean( CellToolTipUtil.isEnabledFor( tree ) ) );
 WidgetLCAUtil.preserveCustomVariant( tree );
}

代码示例来源：origin: org.eclipse.xtext/ui

protected TreeViewer createTreeViewer(Composite parent, int style) {
  Tree tree = new Tree(parent, SWT.SINGLE | (style & ~SWT.MULTI));
  GridData gd = new GridData(GridData.FILL_BOTH);
  gd.heightHint = tree.getItemHeight() * 12;
  tree.setLayoutData(gd);
  final TreeViewer treeViewer = new TreeViewer(tree);
  treeViewer.addFilter(new NamePatternFilter());
  treeViewer.setContentProvider(contentProvider);
  filterAndSorter.setComparator(comparator);
  contentProvider.setFilterAndSorter(filterAndSorter);
  treeViewer.setLabelProvider(labelProvider);
  treeViewer.setAutoExpandLevel(AbstractTreeViewer.ALL_LEVELS);
  IOutlineNode rootNode = document.readOnly(new IUnitOfWork<IOutlineNode, XtextResource>() {
    public IOutlineNode exec(XtextResource state) throws Exception {
      IOutlineNode rootNode = treeProvider.createRoot(document);
      createChildrenRecursively(rootNode.getChildren());
      return rootNode;
    }
    protected void createChildrenRecursively(List<IOutlineNode> nodes) {
      for (IOutlineNode node : nodes) {
        createChildrenRecursively(node.getChildren());
      }
    }
  });
  treeViewer.setInput(rootNode);
  return treeViewer;
}

代码示例来源：origin: org.eclipse.platform/org.eclipse.swt.gtk.aix.ppc

int findIndex(TreeItem[] items, TreeItem treeItem) {
  if (items == null || treeItem == null) return -1;
  Rectangle rect = treeItem.getBounds();
  int index = 0;
  for (int i = 0; i < items.length; i++) {
    TreeItem previousItem = null;
    TreeItem currentItem = items[i];
    if (i > 0) previousItem = items[i - 1];
    Rectangle rect1 = currentItem.getBounds();
    if (rect.y == rect1.y) return index;
    if (rect.y < rect1.y) {
      return index - 1 + findIndex(previousItem.getItems(), treeItem);
    }
    if (rect.y > rect1.y && i == items.length - 1) {
      return index + findIndex(currentItem.getItems(), treeItem);
    }
    if (rect.y >= rect1.y + (1 + currentItem.getItemCount()) * tree.getItemHeight() && currentItem.getExpanded()) {
      index += countSubTreePages(currentItem);
      continue;
    }
    index++;
  }
  return -1;
}

代码示例来源：origin: org.eclipse.platform/org.eclipse.swt.gtk.linux.ppc

int findIndex(TreeItem[] items, TreeItem treeItem) {
  if (items == null || treeItem == null) return -1;
  Rectangle rect = treeItem.getBounds();
  int index = 0;
  for (int i = 0; i < items.length; i++) {
    TreeItem previousItem = null;
    TreeItem currentItem = items[i];
    if (i > 0) previousItem = items[i - 1];
    Rectangle rect1 = currentItem.getBounds();
    if (rect.y == rect1.y) return index;
    if (rect.y < rect1.y) {
      return index - 1 + findIndex(previousItem.getItems(), treeItem);
    }
    if (rect.y > rect1.y && i == items.length - 1) {
      return index + findIndex(currentItem.getItems(), treeItem);
    }
    if (rect.y >= rect1.y + (1 + currentItem.getItemCount()) * tree.getItemHeight() && currentItem.getExpanded()) {
      index += countSubTreePages(currentItem);
      continue;
    }
    index++;
  }
  return -1;
}

代码示例来源：origin: org.eclipse.scout.sdk.deps/org.eclipse.swt.win32.win32.x86

int findIndex(TreeItem[] items, TreeItem treeItem) {
  if (items == null || treeItem == null) return -1;
  Rectangle rect = treeItem.getBounds();
  int index = 0;
  for (int i = 0; i < items.length; i++) {
    TreeItem previousItem = null;
    TreeItem currentItem = items[i];
    if (i > 0) previousItem = items[i - 1];
    Rectangle rect1 = currentItem.getBounds();
    if (rect.y == rect1.y) return index;
    if (rect.y < rect1.y) {
      return index - 1 + findIndex(previousItem.getItems(), treeItem);
    }
    if (rect.y > rect1.y && i == items.length - 1) {
      return index + findIndex(currentItem.getItems(), treeItem);
    }
    if (rect.y >= rect1.y + (1 + currentItem.getItemCount()) * tree.getItemHeight() && currentItem.getExpanded()) {
      index += countSubTreePages(currentItem);
      continue;
    }
    index++;
  }
  return -1;
}

代码示例来源：origin: org.eclipse.swt.cocoa.macosx/x86_64

int findIndex(TreeItem[] items, TreeItem treeItem) {
  if (items == null || treeItem == null) return -1;
  Rectangle rect = treeItem.getBounds();
  int index = 0;
  for (int i = 0; i < items.length; i++) {
    TreeItem previousItem = null;
    TreeItem currentItem = items[i];
    if (i > 0) previousItem = items[i - 1];
    Rectangle rect1 = currentItem.getBounds();
    if (rect.y == rect1.y) return index;
    if (rect.y < rect1.y) {
      return index - 1 + findIndex(previousItem.getItems(), treeItem);
    }
    if (rect.y > rect1.y && i == items.length - 1) {
      return index + findIndex(currentItem.getItems(), treeItem);
    }
    if (rect.y >= rect1.y + (1 + currentItem.getItemCount()) * tree.getItemHeight() && currentItem.getExpanded()) {
      index += countSubTreePages(currentItem);
      continue;
    }
    index++;
  }
  return -1;
}

代码示例来源：origin: org.eclipse.scout.sdk.deps/org.eclipse.jdt.ui

/**
 * Tree-viewer that shows the allowable types in a tree view.
 * @param parent the parent
 */
private void addTreeComponent(Composite parent) {
  fTreeViewer= new TreeViewer(parent, SWT.SINGLE | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
  
  GridData gd= new GridData(GridData.FILL_BOTH);
  gd.grabExcessHorizontalSpace= true;
  gd.grabExcessVerticalSpace= true;
  Tree tree= fTreeViewer.getTree();
  Dialog.applyDialogFont(tree);
  gd.heightHint= tree.getItemHeight() * 12;
  tree.setLayoutData(gd);
  fTreeViewer.setContentProvider(new ChangeTypeContentProvider(((ChangeTypeRefactoring)getRefactoring())));
  fLabelProvider= new ChangeTypeLabelProvider();
  fTreeViewer.setLabelProvider(fLabelProvider);
  ISelectionChangedListener listener= new ISelectionChangedListener(){
    @Override
    public void selectionChanged(SelectionChangedEvent event) {
      IStructuredSelection selection= (IStructuredSelection)event.getSelection();
      typeSelected((ITypeBinding)selection.getFirstElement());
    }
  };
  fTreeViewer.addSelectionChangedListener(listener);
  fTreeViewer.setInput(new ChangeTypeContentProvider.RootType(getGeneralizeTypeRefactoring().getOriginalType()));
  fTreeViewer.expandToLevel(10);
}

代码示例来源：origin: org.eclipse.jdt/org.eclipse.jdt.ui

/**
 * Tree-viewer that shows the allowable types in a tree view.
 * @param parent the parent
 */
private void addTreeComponent(Composite parent) {
  fTreeViewer= new TreeViewer(parent, SWT.SINGLE | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
  
  GridData gd= new GridData(GridData.FILL_BOTH);
  gd.grabExcessHorizontalSpace= true;
  gd.grabExcessVerticalSpace= true;
  Tree tree= fTreeViewer.getTree();
  Dialog.applyDialogFont(tree);
  gd.heightHint= tree.getItemHeight() * 12;
  tree.setLayoutData(gd);
  fTreeViewer.setContentProvider(new ChangeTypeContentProvider(((ChangeTypeRefactoring)getRefactoring())));
  fLabelProvider= new ChangeTypeLabelProvider();
  fTreeViewer.setLabelProvider(fLabelProvider);
  ISelectionChangedListener listener= new ISelectionChangedListener(){
    @Override
    public void selectionChanged(SelectionChangedEvent event) {
      IStructuredSelection selection= (IStructuredSelection)event.getSelection();
      typeSelected((ITypeBinding)selection.getFirstElement());
    }
  };
  fTreeViewer.addSelectionChangedListener(listener);
  fTreeViewer.setInput(new ChangeTypeContentProvider.RootType(getGeneralizeTypeRefactoring().getOriginalType()));
  fTreeViewer.expandToLevel(10);
}

代码示例来源：origin: org.eclipse/org.eclipse.jdt.ui

protected TreeViewer createTreeViewer(Composite parent, int style) {
  Tree tree= new Tree(parent, SWT.SINGLE | (style & ~SWT.MULTI));
  GridData gd= new GridData(GridData.FILL_BOTH);
  gd.heightHint= tree.getItemHeight() * 12;
  tree.setLayoutData(gd);

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

@Override
public void preserveValues( Tree tree ) {
 preserveProperty( tree, PROP_ITEM_COUNT, tree.getItemCount() );
 preserveProperty( tree, PROP_ITEM_HEIGHT, tree.getItemHeight() );
 preserveProperty( tree, PROP_ITEM_METRICS, getItemMetrics( tree ) );
 preserveProperty( tree, PROP_COLUMN_COUNT, tree.getColumnCount() );
 preserveProperty( tree, PROP_COLUMN_ORDER, getColumnOrder( tree ) );
 preserveProperty( tree, PROP_FIXED_COLUMNS, getFixedColumns( tree ) );
 preserveProperty( tree, PROP_TREE_COLUMN, getTreeColumn( tree ) );
 preserveProperty( tree, PROP_HEADER_HEIGHT, tree.getHeaderHeight() );
 preserveProperty( tree, PROP_HEADER_VISIBLE, tree.getHeaderVisible() );
 preserveProperty( tree, PROP_HEADER_FOREGROUND, tree.getHeaderForeground() );
 preserveProperty( tree, PROP_HEADER_BACKGROUND, tree.getHeaderBackground() );
 preserveProperty( tree, PROP_LINES_VISIBLE, tree.getLinesVisible() );
 preserveProperty( tree, PROP_TOP_ITEM_INDEX, getTopItemIndex( tree ) );
 preserveProperty( tree, PROP_FOCUS_ITEM, getFocusItem( tree ) );
 preserveProperty( tree, PROP_SCROLL_LEFT, getScrollLeft( tree ) );
 preserveProperty( tree, PROP_SELECTION, getSelection( tree ) );
 preserveProperty( tree, PROP_SORT_DIRECTION, getSortDirection( tree ) );
 preserveProperty( tree, PROP_SORT_COLUMN, tree.getSortColumn() );
 preserveProperty( tree, PROP_ENABLE_CELL_TOOLTIP, CellToolTipUtil.isEnabledFor( tree ) );
 preserveProperty( tree, PROP_CELL_TOOLTIP_TEXT, null );
}

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